Motor-controlling device.



G. H. DORGELOH. MOTOR 00N TROLLIN G DEVICE.-

APPLIUATION FILED JUNE 24, 190s.

Patented Apr. 6, `1909.

- lrwent'or George H. Dorqeloh,

UNITED sTATEs PATENT oEEioE.

GEORGE n. D oaeELori,.or 'soiiENEorADn NEW Yorin, Assienon ro GENERAL ELEoTEic Y specification.

COMPANY, A ORPORATION OF NEW YORK.

Mo'ron-coN'rRonLING DEVICE., l c f Patented April 6, 1909.

.i`pp1ication sied Iunez'i, i908. serial No. mausi.

n To all whom it may concern:

Be it known that I, GEORGE H. DoneELon, a subject of the Emperor of Germany, residing at Schenectady, county-of Schenectady, State of New York, have invented certain new and useful Improvements in Motor-Controlling D evices, of which the following is a This invention relates to devices for controlling electric circuits and has for yits object the provision of means whereby an electric motor may be started, stopped and generally controlled inra reliable, sale and Vefiicient manner.. A* I My invention relates more specifically to means for controlling motors ofthe type adapted to run at a lowspeed iii addition to the'nornial running s eed, and which it is desired shall be starte and sto ed quickly whii running at full speed. 'y is type of control iscorrimonly used in connection with printing) presses in which it is desired that means e provided whereby the motor may be jogged alongy at a low speed. This jo gin is preferahlyand usually accomplis ed Eliy having switches arranged at diferent points around the press. In the patent to .YatesVSerial No. 357,942, there is disclosed a controlling `device of this type iii which the motor. may be jogged along at .pointsnround the press with the starting arm in the oil position.v It has been found, liowever,-that the operator frequently will not take the trouble of going to one of the control switches or buttons in order to jog the machine but will use the .controlling arm. The result is that. 5'the starting contact segments are frequently injured by, arcing. It has beenifound that in setti-'n the plates and threading the {liaper into tie press an r is frequently required. rotary web pressesv the Furthermore in arge 'static friction isoften so great that the motor will not start with ytheresstance all in circuit so that it is necessary i an impulse with part of the resistance only in circuit. It has also been found desirable to employ an independent speed controlling,l

rheostat. This rheostat I have so arranged that the niotor circuit cannot be closed by anypf the elect ro-iiiagnetic switches until the speed controlling rheostat is in position;

In the accompanying drawing in which I have shown my invention embodiedin. con- .contact 1,6 `is mounted to give the motor i similar pus i 'its initial crete form, Figure 1 is a diagrammatic view oi' the device; and Fig. 2 controlling arm. -1

Referring to the drawing, i, represents a series of segments arranged in an arc of a circle so as to form terminals of starting resistance 2. Arranged concentric with these segments are contact rings 3, el, 5 and 6, all having diii'erent lengths and arranged for purposes hereinafter described. The controlling arm or member 7 is pivoted at S and is provided with a contact brush 9 electrically connected with the arm 7 and adapted to engage the segments 1. 10 is mounted on the arm but insulated therefrom and adapted to bridge the contact rings as shown. The contact rings 5 and 6 are connected by a resistance 11 and a similar resistance 1'2' is connected between the ring 3 and one of the series of studs 13. The controllin'garm 7 is provided with a bridgingcontact or brush 14 adapted to bridge the contacts 15 to short-circuit the controlling arm when the latter is in the running position. `A plunger to move longitudinally in the ostI 17 ad'acent to the contacts 15. This punger will be'engaged by the arm when the latter reaches running position and forced against the tension ot spring 18 into engagement with the contact 19. An electroma netic switch 20 is arranged in series with tlie controlling arm, as shown, and a resistance 21 is connected in series with the coil of this switch and also connected to the resistance 12 at stud 13.` A speed regulating rheostat provided with" a series of studs 22 arranged to be engaged by the controlling arm 23 is mounted adjacent the lstarting rheostat. l A bridging contact 24 ismounted on the arm 23 so as to engage the contacts 25 when the arm 23 is in the initial position. These studs 25 complete the circuit of the is a detail of thel A similar brush coil of switch 2O as well as the coil of switch l 26. This latter switch is adapted to connect the resistance 27 in parallel with the armature A as hereinafter described.` A' third electromagnetic switch 2S is adapted to short-circuit a portion ot-the resistance 2 when the usli button 2.9 is operated." A button 30 is arranged to control the switclr20. A switch '31 is a'rianged to be set in either one of two positions so th'at the motor may be run at normal speed or jogged along as desired. 32 represents in a conventional manner a single pole circuitbrealcerconnected in the line. Zlhe arrangement of circuits and mode of operation are as follows: with the switch 31 in the position Shown in the drawing, the parts are arranged for normal running. Vith the arm 7 in the starting position in contact with the ring segment 6 and stud 1B the electromagnetic switch 26 will be energized from the positive main through brush 1l), contact 6, conductor 33 and back to the negative main across the studs 25, the arm 23 being in its initial position. the resistance 27 in parallel with the armature and a low speed will be obtained. When the arm is moved a little farther so that tlie'brush 10 engages stud 13 adjacent to ring 3, switch 20 is energized as follows: from the positive main, brush 10, resistance 21, solenoid 20, switch 31, contacts .25 and back to the negative main. l'fhis closes the armature circuit at contacts 34 so that the armature circuit will be 'from the positive main through arm 7 ,resistance 2, conductor 35 thence through the resistance 27 and armature-A in parallel and back to the nega- 'f tive main. '.l he harm, 7 is now moved so as to cut out the starting resistance, and when the running position is reached, the arm 7 is short-circuited across the contacts 15. It will be seen, however, that as brush 10 passes o'f of segment 5, the switch 26 is deenergized so that the resistance 27 is no longer in circuit. When brush 10 passes on to segment 3, thc resistance 12 is cut in se- 4ries with the solenoid switch 2() so as to rel duce the current to an amount suHicient to hold the switch closed. If the switch, however, is opened, it will be necessaryto bring the arm back to starting position and eliminate the resistance 12 before it can again be closed. rihe same is true of the resistance 1,1 which is connected in series with the solenoid of switch 26 when the brush 10 closed after it is once opened.

moves from contact 6 to contact 5. rlfhis necessitates the return of the arm to starting position before the switch 26 can be When the controlling arm 7 reaches running position the circuit of the switch 20 is completed through the contacts 15 and 19 instead of through contacts 25, so that the arm 23 may be moved to the right to speed up the motor by weakening the field F.

When it is desired to jog the motor along the arm 7 is returned to starting position and the switch 23 to its initial position. When the switch 31 is moved on to the Jogging button, ush button 30 is pressed, and the circuit or solenoid 20 will be as follows: from the positive main to stud 13,

conductor 36, switch 31, coil 20, ush but` ton 30, contacts 25 and back to hne. This will close the armature circuit through all of the starting resistance withthc resistance 'l he energizing of switch 26 connectsv 'and controlled vby the regl 27 in parallel with the motor armature.l If the load on the motor is so great, due either to static friction or other causes, that the motor will not start, the button 29 may be pressed which will energize the switch 2S and short-circuit a section ot resistance so that the current will pass through the conductor 37 and short-circuit the first five sections. of resistance. This will give the motor sufiicient impulse to start and the button 2 9 may then be released. When the motor is normally running it may be stopped by actuating the push button 30, vwhich will short-circuit the coil of switch 20 and open the circuit at contacts 34. It will then be necessary to brin the arm back to the starting position in or erto again close the switch 2O as above described.

While l have described my invention in connection. with a specific structure and as operating in a denite manner, it should be understood that I do not limit my invention thereto except in so far as it is limited by the scope of the claims annexed hereto.

N'Vhat I claim as new and desire to secure by Letters Patent of the United States, is,

i. The combination with an electric motor, of a starting rlieostat therefor, an auxiliary resistance, and an electromagnetic device arranged to be energized to connect said resistance in parallel with the motor armature during a ortion of the movement of tlic rheostat an( denergized to exclude said auxiliary resistance during the remaining movement.

tor, of a starting rheostat therefor, an .auxiliary resistance, an electromagnetic device arranged to be energized to connect said resistance in parallel with the motor armature during a por'tion of the movement ofv the rheo'stat and denergized 'to exclude said auxiliary resistance during the remaining movement, and an electromagnetic.

switch in series with the starting rhcostat.

3. The combination with an electric Inotor, of a starting resistance for'the armature circuit, a controlling member therefor, an auxiliary resistance, an electromagnetic drevice arranged to beenergized to connect said resistance in parallel :with the motor armature during a ortion ovthem'oveinent of the member an denei'giaedto exclude saideuxiliary resistanceduring'the remainl ing movement, and an ciectromasgnetic switch arranged to short-circuit a portion of the resistance with the controlling member in starting position.

4. The combinationwith an electric motor, of a starting rheostat therefor, a speed regulating rlieostat, an electromagnetic switch in series withthe starting rheostat lating rheostat, means whereby solid switc is closed bythe initial movement of the starting rheostat,

and means independent yof. either rheostat for controlling the switch.; 5.- The combination With an electric l, motor, of a starting resistance for the armal ture circuit, a controlling member therefor, an electromagnetic switch in series with l said resistance, and' an ..electromag1ietic switch/arranged to short-circuit aportion of l the starting resistance Wheii'the controlling member is in the ov position. j 5. The.. combination with an electric motor, of a starting resistance for. the arma'- ture circuit, a controlling member therefor, an electromagnetic switch in series with `said resistance, `means whereby said switch 'fis closed when the member ismoved 'toward running ositiofn, means for controllingsaid switch W vien thememb'er is in' the off"po`si ,tion andv an -j electromagnetic fdevice ar-V ranged tol short-circuit 'a portion of the start' j resistance when the controlling member is'fin theo position.. l, f7. The combination. with an electric motor, of `a starting,rheostat-therefor, an auxiliary resistance, an V.electromagnetic device arranged to be-'energized to connect said resistance in parallel with the motor armature .during Aa portion of" the moveme't ofA .therheostat and dener'gi'zed to exc nde said auxiliary-'resistance during the 'remaining movement, an electromagneticV switch' arranged to shoitrcircuit aportion of the starting. 'resistance without moving the rheost t, aj speed 'regulating rheostat, and', means for`uV reventing the"`energi zing of electromagnetic. switches until either of sai the regulating position.A n f 8. The,4 ombiiiation with an electric motor, of a 'startinffrlieo's'tat therefor, an auxiliaryv resisten' e, "an electromagnetic lswitch arranged' to be energized t`o connect said. resistancein parallellwith the'motor 'i varmature during a ortion of the-movement 450i the rheostat van motor, oEa starting rliieostat is m' a predetermined lfmy ima this saidjauxili'ary resistance during the remaining movement, an'i electromagnetic switch in 'series-lv vvith the starting rlieostat, a speed regulatingl rlieostat, ing the energizing of eitherof said electrorheostat is ina predetermined pofsition.

' 9. Tlie combination With an electric motor, yo? 'a `starting resistancefr the armature circuit, a controlling member therefor,l an auxiliary. resistance, an electromagnetic' switch arranged.y to be energizedlto' ronnect said auxiliaryresistance in parallel with the motor armature during a portieri of the 'movement of the controlling member and de-y and means for -prevent-z- 5'() .magnetic switches until the lregulating cof.'

.energized-v toexclude Said auxiliarvr'esi'st ance during the remaining movement, an

electromagnetic switch in series with starting resistance, and an electromagneticswitch arranged to short-circuit a portion of the "starting resistance independently ofthe movement of the controlling member. l

1'0. The combination Wi lil 'an Y auxiliary resistance, an electromagnetic device. arranged to be energized the lectric. i

rheost'attherefor, an Y 70 to connect said" i 1.

' resistance! inrparallel withl the motor. armatureduring a' portion of` tlie' movement of y the rlieostat and denergiz'ed to fexcl'udesaid auxiliary resistance during the remaining movement, an electromagnetic switch arl"ranged to shtcircuit a portionof the start .ing resistance.' Without moving the rlieoata't, an l electromagnetic switcli` in series vwithl the l starting rheostat, a speed-regulating rheof stat, and vmeans lfor 'prevei'iting the 'energiztermined position. 4

June, 190s.- i noireninoii.-

I have hereunto J ingof any-otwsaid'electromagnetic switches until 'the regulatingerlieostat is in aik'ire'de- 

